Whatever you expected doesn't mean the company needs to fulfill, so it is not cheating.
But it is still up to you to accept or not, they can't force you.

I would say almost all, if not all salary offers from companies are gross salary before your tax and epf deduction. You are only a fresh graduate and still young. Most importantly is the prospect of the job. Worst come to worst, you can always resign and take up another higher job offer in the future.

What is so difficult about it? We know that EPF contribution deducts 11% off your gross, there's SOCSO for RM14.75, and beyond a certain range, you get to use the tangga cukai to calculate PCB. Unless you are earning commission (which nature makes it difficult to calculate the net salary in the first place), knowing the net salary can be done by using simple calculations

I know this because I see people's salary 10 times a day I don't share it with anyone, but when people ask, which industry they should be in and which job should they take, i can immediately give them suggestions